1D -- The surface has discontinuous granular shape, also known as
fog surface.
Processing technology: hot rolling + annealing shot peening
pickling + cold rolling + annealing pickling.
2D - A slightly silvery white colour.
Processing technology: hot rolling + annealing shot peening
pickling + cold rolling + annealing pickling.
2B -- Silver white with better gloss and flatness than a 2D
surface.
Processing technology: hot rolling + annealing shot peening
pickling + cold rolling + annealing pickling + quenching and
tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror
surface.
Processing technology: hot rolling + annealing shot peening
pickling + cold rolling + annealing pickling + surface polishing +
quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B
with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B
with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate
granularity of abrasive materials for polishing the surface is a
continuous abrasive grain.
MIRRO -- Specular.
Processing technology: 2D products or 2B products with appropriate
granularity of the grinding material grinding and polishing to the
mirror effect.
